Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Land Rover Defender 90 First EditionFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Index DTC: Cruise Control Module -- Defender/L663
- Diagnostic Trouble Code Index - DTC: Cruise Control Module (G2818898)
- Description And Operation
- Cruise Control Module (CCM)
- Notes
- DTC C0078-61: Tire Diameter - Signal calculation failure
- DTC C1A67-25: Forward Looking Sensor - Signal shape/waveform failure
- DTC C1A67-54: Forward Looking Sensor - Missing calibration
- DTC C1A67-78: Forward Looking Sensor - Alignment or adjustment incorrect
- DTC C1A67-97: Forward Looking Sensor - Component or system operation obstructed or blocked
- DTC U0046-88: Vehicle Communication Bus C - Bus off
- DTC U0300-56: Internal Control Module Software Incompatibility - Invalid/incomplete configuration
- DTC U0305-00: Software Incompatibility with Cruise Control Module - No sub type information
- DTC U0305-54: Software Incompatibility with Cruise Control Module - Missing calibration
- DTC U2036-93: Driver Assistance Domain Controller - No operation
- DTC U2300-54: Central Configuration - Missing calibration
- DTC U2300-55: Central Configuration - Not configured
- DTC U2300-64: Central Configuration - Signal plausibility failure
- DTC U3000-19: Control Module - Circuit current above threshold
- DTC U3000-92: Control Module - Performance or incorrect operation
- DTC U3000-93: Control Module - No operation
- DTC U3000-94: Control Module - Unexpected operation
- DTC U3000-98: Control Module - Component or system over temperature
- DTC U3006-17: Control Module Input Power "A" - Circuit voltage above threshold
- Cruise Control Module (CCM)
- Description And Operation
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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